feat: make enum for numbers pass

[bfabio]

Make enum for number pass even when there's no minimum and maximum.

Also, allow enum only if minimum and maximum are not set.

[vercel[bot]]

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Name	Status	Preview	Updated
api-oas-checker	❌ Failed (Inspect)		Oct 4, 2022 at 2:27PM (UTC)

[bfabio]

Some tests fail, but If this is good we can fix those and we can also do something similar to strings types.